Fix DRIVER_POWER_STATE_FAILURE (Blue Screen )

This Problems Occurs When :
1. You have a client computer is running Windows 7 or Windows Server 2008 R2.
2. You use a Layer Two Tunneling Protocol (L2TP) over IPsec tunnel to initialize a virtual private network (VPN) connection to a corporate network from the client computer.
3. You disconnect the VPN connection.
4. You put the client computer into Hibernate mode.

In this problems the computer takes several minutes when it tries to enter Hibernate mode. Then the computer crashes. Additionally, you receive a Stop error message that resembles the following:
DRIVER_POWER_STATE_FAILURE

This Problems Occurs because :
a race condition between the L2TP and Telephony API (TAPI).

How to fix this Blue Screen Message DRIVER_POWER_STATE_FAILURE problems :
STEP 1 :
Download This Update Pack :
http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=980399&kbln=en-us
Restart Computer after hotfix applied

File information :
The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Step 2 :
Workaround for Windows 7 and for Windows Server 2008 R2
To work around this issue, do not put the computer into Hibernate mode.

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